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Showing 1 to 20 of 31 for “"Elongations"”.
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Properties and characteristics of polypropylene fibers spun by the phase-separation technique
… Tensilgraph showed that tenacities, per cent elongations at break, and secant moduli varied directly with draw ratio in ranges from 0.9 to 1.6 grams per denier, from 50 to 150 per cent, and from 17 to 30 grams per denier, respectively. Per cent elongations at break also varied directly with …
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Synthesis and characterization of silk-inspired thermoplastic polyurethane elastomers
… domains allow the elastomers to deform to higher elongations and absorb more energy without a decrease of initial modulus. Shearing of the hydrogen-bonded hard domains orients the hard blocks at a preferred tilt angle of ±20⁰ from the strain direction during tensile deformation.
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Phase separation spinning of polypropylene fibers
… solutions of less are 35 polymer contents showed elongations at break which varied directly with draw ratio for draw ratios of less than about 1500. For higher draw ratios and inverse relationships were observed. The fibers exhibited good hand bulk, and self-coiling and crimping characteristics.
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Effect of Tensile Rate and Carbon Black on the Fracture of Natural Rubber and Styrene-Butadiene Rubber
Tensile strengths and ultimate elongations of both crystallizing NR and amorphous SBR increase with increasing tensile rate and increasing carbon black N115 loading, although the dependence of N115 loading is at least ten-fold stronger.Previous research has shown that edge-cut specimens of gum NR …
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A study of the damage accumulation process in poly(aryl ether ketone ketone) and its AS4 carbon fiber reinforced composites
… have lower moduli, but higher toughness and elongations. The quenched systems also have the best fatigue performance and therefore, it can be concluded that the quenched composite systems have the best potential as far as industrial applications are concerned. Quenching has other advantages …
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Fully-renewable and degradable thermoplastic elastomers.
… Tensile measurements demonstrated impressive elongations and elastomeric properties typical of thermoplastic elastomers, however, the materials were relatively weak. The tensile properties of the polymers were found to be highly dependent on the molecular weight and crystallinity of the …
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The crystal chemistry of MTO₄ compounds with the zicron, scheelite, and monazite structure types
… unit cell edge lengths, tetrahedral quadratic elongations and atomic coordinates of individual atoms; they were modeled as a function of the Shannon radii of the cations and the product of the M and T cation charges. Correlation coefficients for these regressions exceeded 0.9 for nearly all …
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Forms and Rotational States of the Nuclei of Ecliptic Comets
… the time-series photometry rotation rates and elongations were measured, and from these constraints were placed on the bulk density and porosity of nuclei. Multi-filter imaging was performed to enable measurement of their surface colours. In addition, a large amount of ‘snap-shot’ imaging was …
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Structure property behavior of an ethylene-propylene-diene ionic terpolymer containing zinc stearate
… Aging was found to alter stress values at elongations beyond the elastic region. SAXS data indicates that structural rearrangement occurs with aging. DSC studies confirmed the effects of aging in that a difference occurred in thermal behavior between 1st and 2nd meltings. DSC also indicated …
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Hydrogen Fuel Cell Driven Origami-Inspired Large-Elongation Soft Robot Modules
… reconfigurable soft robot capable of achieving elongations up to 1715\%, over twice that of prior art in the field, using an adaptation of the layer-stacking method. By reconfiguring the modules between serial and parallel attachments, the robot collective can achieve linear motion, rotary …
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The measurement of radio source diameters using a diffraction method
… for the case of radio sources at large solar elongations. More stringent limits have been set on the rate of change with distance from the sun of the size of the irregularities in the interplanetary medium. Some nine hundred radio sources have been studied in the survey, and one hundred and …
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Molecular orientation and relaxation behavior in flexible water- blown polyurethane foams
… in the hard segments of the plaques and up to elongations of 100 percent for the PUUE elastomer. Based on this transverse orientation behavior, the polyurea aggregates in the plaques were thought to possess a lamellar-like structure with the long axis of the aggregates aligning in the stretch …
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Lokalisation, Regulation und Interaktionen muriner DNA-Replikationsproteine
… zu sorgen. Dies ermöglicht den Proteinen der Elongations-Maschinerie DNA an mikroskopisch sichtbaren Orten, die als Replikationsfoci bezeichnet werden, korrekt zu synthetisieren. PCNA (proliferating cell nuclear antigen) ist eine Hauptkomponente der Replikationsfoci und fungiert als …
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A report on the testing of electric welds
… Olsen strain gage was used in obtaining the elongations of the specimens. In the tables which follow, the values in the deformation column will be expressed in Tinius Olsen units, each unit being 0.0003333 of an inch. If the value in the deformation column were 2.3 and this value were desired …
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Ab initio computational applications to complex biomolecular systems
… in the backbones. The backbone nicks appeared at elongations of ~1.40-fold. The whole process was accompanied by HB breaking and charge transfers. We have proposed an overstretched structure named O-DNA (Opened-DNA) to clarify the confusion in understanding the behavior of DNA under high force …
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Friction Stir Welding of High-Strength Automotive Steel
… in the weld nugget or HAZ while strength and elongations were well below those of the base material samples.</p>
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Development of Thermoplastic Elastomers with Improved Elastic Properties Based on Semicrystalline Block Copolymers
… PS-b-PEP-b-PS triblock copolymers. For small elongations (< 300%) the PE containing triblock copolymers exhibit a significantly improved elastic recovery. This can be attributed to the increased bridge fraction induced by the immiscibility of the two different end blocks. In contrast, for high …
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A Novel Shape Memory Behavior of Single-crystalline Metal Nanowires
… loading and unloading, these wires can recover elongations of up to 50%, well beyond the recoverable strains of 5-8% typical for most bulk shape memory alloys. This novel behavior arises from a reversible lattice reorientation driven by the high surface-stress-induced internal stresses at the …
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Phase Transformation and Mechanical Behavior of Laser Powder Bed Fusion (LPBF) Manufactured Co-28Cr-6Mo
… settings affected the ultimate strengths and elongations at fracture, leading to the 250W-400mm/s-100μm outperforming the other sets when mostly FCC, and 350W-800mm/s-125μm outperforming the others after the phase transformation. As the phase composition transformed from the as-built γ-phase …
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Computational Modeling to Predict Mechanical Function of Joints: Validations and Applications of Lower Leg Simulations
… Drawer simulation produced similar ligament elongations and loads when compared to cadaver studies.Overall, the computational models were able to predict joint kinematics of the lower leg with particular focus on the ankle complex. Additional parameters can be calculated through such models …
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